Based in UK I received this email from a recruitment agent.
Good signs:
- I can find Lisa in LinkedIn.
- Optimum IT seems a legit company.
- Accurate job title and rate.
Smells (worsts first):
- They ask for 4 last digits of my NIN. (Dodgy)
- They ask for my DOB. (Dodgy)
- My email is in capitals.
- In UK usually does not disclose the client in an email.
- Email came out of the blue to my account that could be easily reach in my Linkedin, blog, CWJobs, JobServe, CVLibrary, etc.